Stool



March 25, 1952 P. DANIELsoN 2,590,382

sTooL Filed April 9, 1949 Patented Mar. 25, 1952 UNITED STATES PATENT FF'ICE STOOL f Ludwig P. Danielson, Evanston, Ill.

Application April 9, 1949, Serial No. 86,464

My'invention belongstothe general class of devices known as stools, chairsk or furniture, and relates 'particularly to a s tool or chair particular- 1y adapted. for use by dentists, beauticians', barbers, bench workers and the like.

A vfurther'object is'` the production of a stool which is' adjustable up o1' down, isprovided with la seat'which may swivel and has casters or rollers so that the same may be easily pushed about. The'same is provided'with anchoring meansor a brake, whereby the stool will be anchored and can not be easily movable on the iioor when occupied. However, in the preferred embodiment ofv the invention it may be adjusted as to height, orthe seat may be swiveled even when the stool is' anchore'don the floor. f

Anotherobject of the invention is the production of an adjustabl'e'stool or the like provided with' eicient braking or' anchoring means which will operate automatically when the stool occupied and whichl will remain anchored until vacated, whereupon the samer may be readily rolled aboutas desired.

Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art' from the disclosure herein given.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more par- ,A

tcularly pointed out inthe claims;

In the drawings, wherein like reference characters indicate like or corresponding parts:

Fig. 1 is a perspective view of the stool embodying the invention;

Fig. 2 is a sectional View taken through the same illustrating the preferred construction; and

Fig". 3 is a sectional View taken substantially on line 3 3 of Fig. 2.

As illustratedi V represents a tubular sleeve and 2 legs or floor engaging members aflixed thereto to form a base for the stool, it being understood that there may be three or more legs, the upper ends 3 of which are bent upwardly and rigidly secured to the sleeve I, either by welding or any other suitable manner. The lower ends are spread to provide greater stability. Arranged within the'tubular sleeve I is an' inner sleeve 4 providing an additional legmember or fioor engaging member which extends above and below the tubular sleeve I, the lower portion 5v of which is sufliciently long to reach to the door, as indicated in Fig. 2 and provide a brake or anchor. Secured to the upper end of the sleeve 4 is an internally threaded member 6 which is welded or 7 Claims. (Cl. 155-88) otherwise rigidly secured tod as indicated at 1;

The stool is provided with a seat designated generally by the reference character 8-'Whicl1f"is secured to a threaded rod or spindle 9 arranged `to threadedly engagev with the member 6. Astillustrated in Fig. 2, suitably secured to the seat bottorn Ill is a block II into' which the rod ii`v is threaded, a lock nut I2 securely retaining theseat 8 and rod S' assembled. The block II may beseoured to the bottom of the seat I0 in any suitable manner, for example, when I0 Vis of metal, I I may be spot welded to I0' as indicated at I3.

Arranged between the threaded member Gand the ends 3 of theleg portions `is a coiledfspring I4 which tends to normally move the seat upwardly to the position shown in Fig. 2 when the same is not occupied.

In'order to limit the relative telescoping movement between sleeves I and 4, as well as to prevent the rotation ofthe innersleeve 4 in the tubular sleeve I, one of the sleeves, as shown the inner sleeve 4, is provided with an elongated slot through which passes a pin I6 extendingv through and aliixed' to the tubular sleeve I.

To add to the attractiveness of the device, I prefer to provide a sleeve I'I'enclosing the upper ends 3 of the legs, the spring I4, member i-and nut i2, which sleeve may be suitably securedto the member lI by means of screws I8 or their equivalents or welded directly tov I I. In order to strengthen the construction a ringl I9 may be provided, as shown, secured to the legs, the same not only making the structure more rigid, but it also may be used as a foot rest by the one occupying the stool. There are also provided casters 20 of suitable type which support the structure and permit the same to be readily and easily rolled or pushed about as desired.

As shown in Fig. 2, the lower end 5 of sleeve 4, which in fact is anV eXtra leg for anchoring. purposes, is provided with av rubber or like foot, 27| which will irictionally engage the floor when-the seat 8 is occupied.

As shown in Fig. 2 in the full lines, the seat8, not being occupied, is elevated by spring I4 and the foot 2l is oil the oor. When a person occupies the seat the rod 9 is moved downwardly, moving the member 8 and with it the inner sleeve downwardly, at the lower end of whichfis the foot 2 I. The stool is now anchored or braked so that it does not readily roll on the casters 20. If the seat 8 is rotated the threaded rod 9 will cause it to raise or lower, depending upon the direction of turning of the seat. When the seat 8 is occupied, the threaded rod S and member Ii wil be pushed down as indicated in dotted lines in Fig. 2, compressing the spring I4. When the stool is vacated the spring I4 will automatically raise the seat, raising the foot 2l, so then the stool 2l may be'pushed here or there as desired.

Obviously, the stool parts may be so designed as to bring the seat the desired distance from the floor when the same is not occupied, it being possible to raise the same by rotating it as mentioned. While the seat is shown as circular, it may be any desired shape, or provided with a back and arms, etc., (not shown) the particular construction of the seat being immaterial so far as the present invention is concerned.

Having thus described my invention,I it is obvious that various immaterial modications may be made in the same without departing from the spirit of my invention; hence, I do not Wish to be understood as limiting myself to the exact form, construction, arrangement and cornbination of parts herein shown and described, or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

1. In a stool of the kind described and compris'ing in combination, a base including a tubular sleeve and a plurality of legs rigidly secured thereto, a seat, supporting means for the seat including an inner sleeve telescoping in the tubular sleeve and of a length to extend to and engage the iioor when the seat is occupied, and means for automatically raising the seat and inner sleeve when the seat is vacated.

2. In a stool of the kind described and comprising in' combination, a base including a tubular sleeve and a plurality of legs rigidly secured thereto, a seat, adjustable supporting means for the seat including an inner sleeve telescoping in the tubular sleeve and of a length to extend to and engage the floor when the seat is occupied, means for limiting the telescoping movement of the inner sleeve in the tubular sleeve and preventing relative rotation of the same, and means for automatically raising the seat and inner sleeve when the seat is vacated. 3;In a stool of the kind described and comprisingy in combination, a base including a tubular'sleeve and a plurality cf legs rigidly secured thereto, a seat, means for supporting the seat including an inner sleeve telescoping in the tubular`` sleeve and of a length to extend to and engage the floor when the seat is occupied, a threaded member at the upper end of said'inner sleeve, a threaded rod secured to the seat and extending through the threaded member, and means for automatically raising the seat and inner sleeve when the seat is vacated.

4. In a device of the kind described and comprising in combination, a tubular sleeve, a plurality of legs spread at their lower ends with the upper ends bent inwardly and secured to said tubular sleeve, the sleeve extending above and' below the juncture of the legs and sleeve, an inner sleeve slidably arranged within said tubular sleeve and of a length to project above and below the tubular sleeve, an internally threaded member rigidly secured to the upper end of the inner sleeve, a threaded rod threaded into said member and of a length tc extend through and above the same, a seat secured to the upper end of said threaded rod, the lower end of said rod depending into the inner sleeve and slidable therein, a coiled spring arranged on said tubular sleeve between said threaded member and the upper ends of said legs, means for preventing relative rotation of the tubular sleeve and inner sleeve and limiting the relative longitudinal movement of the same, said inner sleeve constituting an additional leg movable downwardly to engage the floor when the seat member is occupied.

5. In a device of the kind described and comprising in combination, a tubular sleeve, a plurality of legs spread at their lower ends with the upper ends bent inwardly and secured to said tubular sleeve, the sleeve extending above and below the juncture of the legs and sleeve, an inner sleeve slidably arranged within said tubular sleeve and of a length to project above and below the tubular sleeve, an internally threaded member rigidly secured to the upper end of the inner sleeve, a rod threaded into said member and of a length to extend through and above the same, a seat secured to the upper end of said threaded rod, the lower end of said rod projecting into the inner sleeve and slidable therein, a coiled spring arranged on said tubular sleeve between said threaded member and the upper ends of said legs, means for preventing relative `rotation of the tubular sleeve and inner sleeve and limiting the relative longitudinal movement of the same, said inner sleeve consti tuting an additional leg movable downwardly to engage the floor, and a shell carried by the seat for enclosing the threaded member, rod and spring.

6. A stool including in combination a base comprising oor engaging members, a seat having an additional floor-engaging member depending therefrom, said seat being mounted von said base and said additional floor-engaging member being of sufficient length to engage the floor upon said seat being occupied, and biasing means mounted on said base for automatically raising said seat and said additional floor-engaging member upon said seat being vacated. A

7. A stool including in combination a base comprising a plurality of peripherally spaced leg members having rollers or casters on the floor engaging ends thereof, a seat having an additional leg member depending therefrom, said seat being mounted on said base and said additional leg member being of sufficient length to engage the floor upon said seat being occupied, and biasing means mounted on said base for automatically raising said seat and said additional leg member upon said seat being vacated, said additional leg member serving a's a brake for the stool thus comprised upon said seat being occupied.

LUDWIG P. DAN IELSON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 125,350 Teal Apr. 2, 1872 '740,071 Allen Sept. 29, 1903 1,287,365 Livingston Dec. 10, 1918 1,348,683 Aldenbruck Aug. 3, 1920 1,688,415 Fox Oct. 23, 1928 1,701,951 Holt Feb. 12, 1929 2,024,045 Johnson Dec. 10, 1935 

